Vanadium
Atomic number: 23
Symbol: V
Atomic weight: 50.9415(1)
Electron configuration: [Ar]3d34s2
Group: 5B
Period: 4
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The electron configuration of beryllium is written as [He] 2s2. This means that it has 2s2 electrons above the configuration of Helium.
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 Rb+1 or Kr
Orbital notation shows how the electrons are arranged in the orbitals of the sublevels. Electron configuration shows only how many electrons are in each sublevel.
It is used to determine the electron configuration of an atom, molecule or ion.
Carbon has the chemical symbol of C and an atomic number of 6. Its shorthand or electron configuration is 1s2 2s2 2p2.